Package includes: 6 bags of 1 lb each premium activated carbon (total of 6 lbs) in 6 piece of black mesh bags, size: 8.0" x 6.0" approx. Bagged for easy handling and precise placement of carbon, and to ensure carbon media particles not traveling through pumps and pipes. Zipper-designed mesh bag is reusable. The zipper is made of plastic, and it's safe for freshwater and saltwater use.